Air conditioner



FIG. 1 is a perspective view of an air conditioner, showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the air conditioner which form no part of the claimed design. 

CLAIM The ornamental design of an air conditioner, as shown and described. 